My sister isn't sure and the breeder she got the last two hens from isn't responding to the question.Awww… I’m so sorry, Shad! May I ask at what age she was started on layer feed?
It's a really common problem that slips under the radar over and over again. Plus, in the UK all flock types feeds are quite hard to find and a lot more expensive than the standard layers pellets. Of course, by the time the damage is apparent it's no longer the breeders problem.